Brake-shoe.



KIN SON.

SHOE.

APPLICATION 1 11.21)

Pa 11 m 4,1911.

2 QHEETB-SKEET 1.

' F! 1. DICKINSON.

BRAKE SHOE. APPLIUATION FILED 0M. 18, 1907. RENEWED NOV. 30, 1910.

Patented July 4, 1911.

I 2 SHEETS-SHEET 2.

UNTTED STATE PATENT @FFIQE.

FRANK T. DICKINSON, OF CHICAGO, ILLINOIS.

BRAKE-SHOE.

Application filed October 18, 1907, Serial No. 337,995.

To all whom it may concern:

Be it known that I, FRANK T. DICKINSON, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Brake-Shoes, of whichthe following is a specification.

The invention relates to friction blocks used as a brake on railwaycars, engines, etc., and in particular to friction blocks having a castbody portion and an attaching or securing lug and a connecting memberall adapted to be permanently bound together when the body portion iscast.

It has for its objects to provide a reinforcement for the cast body ofthe shoe, to provide a reinforcement and attaching means for theattachinglug, to provide a means for binding all the parts of the shoesecurely together, to provide a shoe simple and easy of constructionembodying these elements, and to provide a form of construction withsuch elements present which is simple and convenient in the productionof shoes of a great variety of types and widely different use. These andother objects which will hereinafter appear are obtained in my inventionwhich is illustrated in preferred form in the accompanying drawingswherein,

Figure 1 is a longitudinal section of a driver shoe showing the hook anda connecting member in position, Fig. 2 is a cross section on line X-Xof Fig. 1, Fig. 3 is a top plan view showing a type of connecting meansfor a bald driver shoe, Fig. 4 is a top plan view showing connectingmeans used in a flange car shoe, Fig. 5 is a cross section on YY Fig. 4,Fig. 6 is a cross section of a flange shoe adjacent the securing lug,Fig. 7 is the securing lug of Fig. 6 with the flange connecting memberattached, Fig. 8 is'a securing lug with the connecting members attachedas used in construction of a car shoe, and Fig. 9 is a completed carshoe showing the securing lug and the connecting members in place.

The connecting member provided in this invention is of steel or wroughtiron, and is formed by twisting a bar of metal which may be varied inshape and size, but which is preferably constructed of a square bar. Themember is approximately the same length as the shoe or sufliciently longto eX- tend beyond the end lugs thereof thus enabling it to bind allparts of the shoe to- Specification of Letters Patent.

Patented July 4, 1911.

Renewed November 30, 1910. Serial No. 594,975.

gether. When a plurality of connecting members is provided, as is thecase in the preferred form of the invention, the members runapproximately parallel to one another. In the middle of the shoe, wheremeans, as will be hereinafter described, are Y 3 provided for attachingthe connecting member to the securing lug of the shoe and at the ends ofthe shoe adjacent the end lugs thereof where the back of the shoecontacts ber is embedded in the body portion of the shoe or is permittedto be just flush with the back thereof; while the intermediate porwiththe brake head the connecting memtion, where the back of the shoe issomewhat depressed (as will appear in Fig. 9) to save metal and reduceweight, this member is permitted to extend some distance above theoutside of the body portion of the shoe, which will relieve this memberas much as possible from the effect of the heat developed in the shoewhen the brakes are applied. The securing lug is provided with holes orslots to receive the connecting member therethrough thus locking theseelements securely together when the body portion of the shoe is cast. Bytwisting the connecting members the power of resistance against breakageis increased and they present a surface which will prevent the bar beingdrawn out of the shoe lengthwise after the body portion is cast aboutthe same, as is often the case with a bar presenting a straight surface,due to the shrinkage of themetal or other causes. It will be seenthat abrake shoe is thus obtained witha cast body portion a securing lug and aconnecting member for connecting the parts of the shoe and the securinglug together and in which these elements are securely locked togetherwhen the body portion of the shoe is cast. And further, that a simpleconstrue tion is provided which is equally efficient and convenient inthe production of a great variety of shoes adapted to a widely dilfenfor receiving metal of the body portion when the same is cast. It willthus be obvious that the slot 5 and the members 2 will secure the hookagainst falling out of the body of the shoe until the same ispractically worn out. And on account of the uneven surface of themembers 2 guaranteeing against any endwise movement of the same asuccessful locking of all the elements is obtained. The members 2extending the full length, and in certain cases one or both of thesemembers lapping over and traversing the width. of the shoe as shown inFigs. 4 and 3, it will be seen that in case of breakage any portionbroken off can not become separated from the balance of the shoe. Themembers 2 are extended beyond the end lugs 27 thereby strengthening theshoe at points 28 where it is required to sustain heavy weight andpreventing the loss of the end of the shoe if broken off.

Fig. 3 illustrates the manner in which the connecting member is employedin a bald driver shoe. The members are arranged one on each side of theshoe extending throughout its length and each turning at right anglesand extending across the respective ends of the shoe as indicated at 7and 7 This arrangement reinforces the entire shoe and guards completelyagainst loss of any portion thereof if the shoe is broken.

Figs. 4 and 5 show a flange car shoe. It will be observed in this typeof shoe that the connecting member traverses the main body portion ofthe shoe at its ends 8 and at approximately one-third the length of theshoe a portion 9 of the connecting member is turned into and traversesthe flange portion of the shoe. Fig. 5 is a cross section of Fig. 4 andshows the position of the connecting member where it connects the mainbody portion and the flange portion of the shoe. A connecting member isalso provided extending the full length of the main body portion of theshoe as shown.

Figs. 6 and 7 show another type of flange shoe in which the attachinglug 10 is adapted to bind the flange portion to the main body portion.Fig. 6 is a cross section of the shoe adjacent the attaching lug 10, andFig. 7 shows the lug with the flange connecting member 15 attached. Thelug is provided with slot 13 for joining the brake head, slot 14 forreceiving metal and attaching the lug to the main body portion when theshoe is cast, and with projections 15 provided with eyes 16, or thesemay as preferred be slots 4 as shown in Fig. 2, for receiving theconnecting members which traverse the body portion of the shoe. The lugis further provided with an extension 17 secured to the flange portionof the shoe which is also provided with an eye 16 for receiving theconnecting member which traverses the flange portion of the shoe. Whenthe body portion of the shoe is cast the lug is partially embeddedtherein as shown in Fig. 9 and is securely joined thereto by means ofits pro jections and the connecting members as shown. Either of thesemethods furnishes a secure locking together of the parts of the shoe andespecially the locking of the flange portion to the body portion.

Fig. 8 is a lug with the connecting members attached which are used inthe construction of a car shoe.

It will be observed that in providing the means shown for attaching thelug to the body portion of the shoe and to the connecting members, thatthe connecting members extend throughout approximately the entire lengthof the shoe, and are completely or partially embedded in the bodyportion thereof, as above described, and that the securing lug is alsopartially embedded in the body portion with the casting metal extendingpart way into the lug as shown at 26 in Fig. 9. A complete and securereinforcing and locking of the parts of the shoe is thus obtained.

Having thus described my invention and illustrated its use, what I claimas new, and desire to secure by Letters Patent, is the following:

1. A brake shoe comprising a cast metal body portion, an attaching lug,and a bar of twisted metal engaging the said lug, substantially asdescribed.

. 2. In combination in a brake shoe, a cast metal body, an attachinglug, and a bar of twisted metal, all adapted to be securely lockedtogether when the body portion is cast, substantially as described.

3. A brake shoe comprising a cast body portion, an attaching lugprovided with slotted projections to be embedded in and lock the lugsecurely to the body portion when cast, and a bar of twisted steelpassing through .the slots in the said lug and traversing the length ofthe shoe and adapted to become an integral part thereof when the bodyportion is cast, substantially as described.

4. A brake shoe comprising a cast metal body portion, an attaching lugsecured to said body portion, and a bar of twisted steel passing throughthe said lug and adapted to be embedded in the body portion of the shoewhen the same is cast, substantially as described.

5. A brake shoe comprising a cast body portion, an attaching lug securedto the said body portion, and a bar of twisted steel passing through thesaid lug and completely embedded at the ends and the middle of the saidbody portion and to be partially embedded throughout the interveningportions of its extent when the shoe is cast, substantially asdescribed.

6. A flange brake shoe comprising a cast for a portion of its extent themain body portion of the shoe and throughout its remaining length theflange portion of the shoe, substantially as described.

7. A flange brake shoe comprising a cast body portion and flangeportion, an attaching lug secured to the body portion and the flangeportion of the shoe, and bars of twisted steel passing through the saidlug in the body portion and in the flange portion, substantially asdescribed.

8. A driver shoe comprising a cast body portion, a lug provided withslotted projections attached to the said body portion for the insertionof bars of twistedsteel forming connecting members each of which membersextends throughout the length of the shoe and alternately across theends thereof, substantially as described.

9. A driver shoe comprising a cast body portion, a hook with a slot toreceive cast metal and apertures for the insertion of bars of twistedsteel forming connecting members and traversing the length of the shoe,substantially as described.

10. A driver shoe provided with two connecting elements each traversingthe length of the shoe and the one turning at right angles andtraversing one end of the shoe beneath the end lug and the other elementturning at right angles in the opposite direction and traversing theopposite end of the shoe beneath the end lug at said end of the shoe,substantially as described.

In testimony whereof I have hereunto signed my name in the presence ofthe two subscribing witnesses.

FRANK T. DICKINSON.

Witnesses:

PAUL CARPENTER, G. W. CUNNINGHAM.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

